Ring-rolling machine



J. ECKERT.

RING ROLLING MACHINE.

APPLICATION FILED use. 3, 1919.

Patented Feb. 8, 1921.

2 SHEETS SHEET I.

1. ECKERT.

RING ROLLING MACHINE.

APPLICATION FILED FEB; 3, I919.

O IIH' Patented Feb. 8, 1921.

ZSHEETS-SHE-EI' 2.

UNITED STATES PATENT OFFICE.

J 'OHN ECKERT, F MILWAUKEE, WISCONSIN.

RING-ROLLING MACHINE.

Specification of Letters Patent.

Patented Feb. 8, 1921.

Application filed February 8, 1919. Serial No. 274,730.

To all whom it may concern.

Be. it known that I, JOHN EoKnnT, a citiuse in forming unbroken rings from a solid plece of metal and consists 1n the novel construction and arrangement of the parts as hereinafter described and more particularly set forth in the claims hereof.

The invention further consists in the several features hereinafter set forth.

In the drawings:

Figure 1 is a front end view of the ring rolling machine embodying the invention;

Fig. 2 is a plan view thereof;

Fig. 3 is an elevation view thereof;

Fig. 4 is a detail sectional view taken on the line 44 of Fig. 2;

Fig. 5 is a detail sectional view taken on the hue 5-5 of Fig. 1;

Fig. 6 is a view of a block of metal;

Fig. 7 is a view of a rough blank;

gig. 8 is a view of a roughly formed ring; an 7 a Fig. 9 is a detail view of a modified form of roll.

Referring to the drawings, a piece of metal 9, shown in Fig. 6, is heated and forged into the rough blank 10, shown in Fig. 7, and where the work is large this is done on a steam hammer. The blank 10 is then placed upon a suitable mandrel or die and forged into a rough ring 11 and wherethe work is large this is done on a steam hammer, after which the heated rough ring is formed to approximate size in the ring rolling machine.

The ring rolling machine has a frame consisting of a base plate 12, uprights 13, a rear frame member 14, and spaced apart front frame members 15 and 16.

The rear frame member 14 is provided with spaced shaft bearings 17 and 18, the bearing 18 being pivotally mounted in the arms:19 of the frame 14 by means of trunnions 20 secured to said bearing and journaled in the arms.

A fixed bearing 21 is mounted on the front upright 13 between the members 15 and 16 and a movable bearing-22 is vertically slidably mounted between the sides 23 and 24 of the members 15 and 16.

A shaft 25 is journaled in the bearings 17 and 21 and a shaft 26 is journaled in the bearlngs 18 and 22. A gear 27 on the shaft 25 meshes with a gear 28 on the shaft 26 so that rotation of one of the shafts drives theother in an opposite direction. The shaft 25 is driven by a motor 29 through a worm 30-, on the motor shaft 31, meshing with a worm wheel 32 on the shaft 25.

A rmg forming die roll 33 is detachably secured to the shaft 25 to be turned thereby and a similar die or roll 34 is detachably secured to the shaft 26 and turned thereby.

' Each of these dies is provided with an annular groove 35 preferably having sides ex: tending at right angles to the bottom of the groove. The turning of the shafts 25 and 26 rotates the rolls 33 and 34 in opposite directions. The shape of the grooves of the rolls determines the shape of the cross section of the ring and in Fig. 9 I show a roll 34f similar to roll 34 and a roll 33 having a groove 35' therein rovided withian annular shouldered portlon 64 so' that an annular flange will be formed on the inner pe-- riphery of the ring, a thing which is very diflicult and almost impossible to do on a steam hammer.

In order to introduce the rough ring between the dies and to gradually work it into shape, means are provided for elevating and depressing the roll 34by raising and lowering the front end of the shaft 26 upon which this roll ismounted, said shaft swinging in the trunnions 20 and the teeth of the gears 27 and 28 being long enough to accommo date this swinging movement. This means consists of a shaft 36 carrying an eccentric 37, an eccentric rod 38 pivotally connected by a pin'39 to the bearing 22, and means for rotating the shaft 36. The means for rotating the shaft 36 consists of a worm wheel 40 on said shaft meshing with a worm 41 on a shaft 42 whichcarries a sprocket 43 connected by a chain 44 to a sprocket 45 on the shaft 26.

Mechanism is also provided to stop the rotation of the shaft'36 after it has made one revolution, consisting of a clutch for drivingly connecting the worm wheel 40 with the shaft 36 and means for automatically throwin out the clutch.

' The worm. wheel 40 is loosely mounted on inner and outer peripheries of the ring as in a bracket 52and engages a cam projec-- tion 53 on the member 47 whereby the wedging of the pin 51 against the projection slides the member 47 on the shaft 36 out of engagement with the wheel 40. The pin 51 is moved out of engagement with the cam by manually actuated means consisting of a lever 54passing through a slot 55 in the pin,

pivotally connected intermediate its ends to the bracket 52, and operatively connected by a link 56 to one end of a bell crank lever 5 mounted on a shaft 58, the other .end of said bell crank lever being connected by a link 59 to a foot pedal 60. A weight 61 adjustably mounted on the pin carrying end of the lever 54 normally acts to keep said pin in contact with the member 47.

With this construction, when the pin is holding the clutch out the rolls are separated from each other and a heated roughly formed ring 63 is placed over the lower roll 33 so that a portion of the ring is in line with or is seated in the groove in that ring. Then the operator moves the pin 51 upwardly, releasing the clutch, and the roll 34 is fed downwardly by theeccentric drive previously described. and the rolls are thus brought into rolling contact with the ring, and as the roll 34 moves vdownwardly pressure is being continuously applied to the said ring is revolved between the rolls, so that when the roll 34 starts on its upward movement due to the raising of the eccentric rod 38 by the eccentric 34. the ring has been rolled to approximatesize. Just before the roll 34 reaches its upper position, the pin 51 contacts with the inclined side of the cam 53 and thereby throws the clutch out when the roll 34 has reached its upper position. The treated ring is then removed and the operation is ready to be repeated.

After the ring has been rolled to approximate shape on the machine, it may be placed on a mandrel and gaged to the desired size. To cool the rolls and also remove scale from the ring during the rolling operation.

" a jet of water is directed upon the upper roll from a pipe 62 connected to any suitable water supply.

To prevent any tendency of the lower end of the ring to swing. it is held between two guide rollers 64 and 65, one of said rollers 65 being mounted on a lever 66-provided with a foot pedal arm 67 under the control of the operator. The lever 66 is normally moved inwardly to bring the roller 65 into engagement with the ring by a spring 68 yieldingly connecting said member to the frame ofathe machine so that the ring may be held between the rollers 64 and 65 during the rolling operation and released by pressure upon the foot pedal 67.

,lVhat I claim is:

1. In a ring rolling machine, the combination of a pair of spaced apart shafts, means for rotating said shafts in opposite directions, a ring-forming roll mounted on each of said shafts, means for raising and lowering the roll-carrying end of one of said shafts including a rotating shaft, means for automatically stopping the rotation of said last named shaft after a single revolution, and operator-controlled means for rendering said stopping means operative.

2. In a ring rolling machine, the combination of a pair of spaced-apart shafts, means for rotating said shafts in opposite directions, a ring-forming roll on each of said shafts, and means for raising'and lowering the roll-carrying end of one of said shafts comprising a hearing at this end of the shaft, a pin on said bearing, a driven shaft, an eccentric on said driven shaft, a member connecting said eccentric with said pin, and means for controlling the operation of said driven shaft.

3. In a ring rolling machine, the combinationof a frame having spaced standards, fixed bearings mounted in said standards, a shaft journaled in said bearings, another bearing carrying trunnions pivotally mounted in one of said standards, and a bearing slidably mounted in the other standard. a shaft journaled in said pivoted and sliding. bearings, said shafts carrying cotiperative ring-forming rolls, a gearing connection between said shafts, means for driving the first named shaft, 9. third shaft for vertically moving the second-named shaft, a driving connection between said said first named shaft and third shaft, and a driving connection between said third shaft and sliding bearing.

4. In a ring rolling machine, the com:

,bination of a pair of spaced-apart shafts,

means for rotating said shafts inopposite directions, a ring-forming roll mounted on each of said shafts, means for raising and lowering the roll-carrying end of one of said'shafts including a driven shaft, a constantly rotating shaft, a gearing connection between said driven shaft and rotating shaft, clutch mechanism for said gearmg v means for rotatin said shafts in opposite 5. In a ring rolling machine, the combination of a pair of-spaced apart shafts,

6. In a v ring rolling machine, the com I binationof a pair of spaced apart'shafts,

directions, 'a ringorming r011 mounted on each {of said shafts, and means for lower- .ing the roll-carrying end of one of said shafts including adriven shaft operatively connected thereto, a wormwheel mounted on said drivenshaft, a clutch connection between said worm wheel and said driven 20 shaft, and a worm meshing with sa1d worm wheel and driven by the other roli arrying shaft. 4

In testimony whereof, I ,aflix my signature, in presence of twowitnesses.

v JOHN ECKERT.

Witnesses:

Vrcron 1 13mm, IJJ. ScnUL'm. 

